JP4101196B2 - Thermal insulation structure - Google Patents

Description

  The present invention relates to a heat insulating structure in which a plurality of vacuum heat insulating panels are arranged side by side so as to be adjacent to each other along a surface to be insulated.

The above heat insulating structure is, for example, the outer surface of the side wall of the container or the outer shell of the double shell for storing a gas body having a liquefaction temperature lower than room temperature such as natural gas, ethylene, propylene, propane, ammonia, carbon dioxide gas, butadiene, butane, etc. It is provided to insulate a heat insulation target surface such as the inner surface of the tank or the outer surface of the double-shell inner tank, and has a heat conductivity of about 1/5 that of rigid polyurethane foam (for example, JP 2000-355617 A). No. 2) are arranged side by side, so that there is an advantage that the heat insulation thickness can be reduced.
In the above conventional heat insulation structure, in order to prevent heat from entering and exiting through joints between adjacent vacuum insulation panels, foam insulation such as rigid urethane foam with higher thermal conductivity than vacuum insulation panels is used in-situ foaming. In the construction method, etc., the joints are filled and insulated (this is a conventional technique and information on prior art documents cannot be disclosed).

For this reason, in order to ensure a substantially uniform heat insulation performance over the entire surface to be insulated, the joint is foamed with a large thickness so that the thermal conductivity in the joint is equivalent to the thermal conductivity of the vacuum thermal insulation panel. It is necessary to cover with a heat insulating material, and there is a drawback that the heat insulating structure is enlarged.
This invention is made | formed in view of the said situation, Comprising: It aims at ensuring substantially uniform heat insulation performance over the whole surface of a heat insulation object surface, without enlarging a heat insulation structure.

A first characteristic configuration of the present invention is a heat insulation structure in which a plurality of vacuum heat insulation panels are arranged side by side along a heat insulation target surface, and the plurality of vacuum heat insulation panels are arranged on a heat insulation target surface. Adjacent to each other, joints are provided between adjacent vacuum insulation panels, and the foamed resin insulation is placed inside the outer periphery of the vacuum insulation panel so that the outer periphery of the foam resin insulation wherein the heat insulating target surface side of the vacuum insulation panel is fixed at the opposite surface, an auxiliary vacuum insulation panel, along the joint portion, so as to extend on both sides in the width direction of the joint portion, and In the point which is provided between the outer peripheral parts of the said foamed resin heat insulating materials which adjoin .

[Action and effect]
A plurality of vacuum heat insulation panels are arranged side by side so as to be adjacent to each other on the surface to be insulated, and joints are provided between the adjacent vacuum heat insulation panels. It is fixed to the surface on the opposite side of the heat insulation target surface side of the vacuum heat insulation panel so as to enter the inner side of the outer periphery of the auxiliary vacuum heat insulation panel, along the joint portion between the adjacent vacuum heat insulation panels, as spans both sides of the width direction of the joint portion, and, since is provided between the outer periphery of the adjacent foamed resin insulation, in particular without covering the joint portion in the thickness is thick foam insulation, joints It is possible to insulate so that the thermal conductivity in the case becomes equal to the thermal conductivity of the vacuum thermal insulation panel, and it is possible to ensure substantially uniform thermal insulation performance over the entire surface to be insulated without increasing the size of the thermal insulation structure.

  A second characteristic configuration of the present invention is that a heat insulating material made of foamed resin is preliminarily arranged in parallel with a vacuum heat insulating panel fixed to one side so that the outer peripheral portion enters the inner side of the outer peripheral portion of the vacuum heat insulating panel. It is in a certain point.

[Action and effect]
Since the vacuum heat insulation panel in which the foamed resin heat insulating material is fixed in advance on the one side surface is arranged side by side, the vacuum heat insulating panel is provided in the heat insulation structure in which the foam resin heat insulating material is provided on one side surface of the vacuum heat insulating panel. At the same time as mounting, a foamed resin heat insulating material can also be mounted integrally to improve the construction efficiency.
In addition, the insulation material made of foamed resin is fixed on one side so that the outer peripheral part enters the inner side of the outer peripheral part of the vacuum heat insulating panel, so that the auxiliary vacuum heat insulating material extends over both sides of the joint between the vacuum heat insulating panels. The installation space of the panel can be formed in a groove shape sandwiched between adjacent foamed resin heat insulating materials along the joint portion, and the auxiliary vacuum heat insulating panel can be easily attached in a positioned state.
The third characteristic configuration of the present invention is that an auxiliary foam heat insulating panel is bonded and fixed to the outer surface side of the auxiliary vacuum heat insulating panel.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a heat insulation structure according to the present invention provided on the outer surface 1 of a tank of a steel cylindrical tank A for storing a cryogenic liquid such as liquefied natural gas. A plurality of main heat insulation panel units B are juxtaposed along the tank outer surface 1 so as to be adjacent to each other with a polyethylene foam cushioning material 2 for absorbing uneven portions such as weld seams.

  As shown in FIG. 2, the main heat insulation panel unit B has a rectangular main vacuum heat insulation panel (thermal conductivity: 0.004 W / (m · K) at 0 ° C.) 3 in a plan view, In advance, the outer peripheral portion of the polyurethane foam main foam insulation panel (foamed resin insulation material) 4 that is rectangular in plan view enters the inside with a constant width in the panel surface direction from the outer periphery of the main vacuum insulation panel 3. Adhesive and fixed, the outer surface of the main foam insulation panel 4 has both moisture-proof and protective functions such as galvanized steel sheets, colored galvanized steel sheets, aluminum alloy plates, and FRP plates with a thickness of about 2 mm. The exterior material 5 is attached over the entire surface.

  Then, as shown in FIG. 2, the washer so as to straddle the outer peripheral portion of the adjacent main vacuum heat insulation panel 3 on the stud bolt 6 fixed to the tank outer surface 1 along the side edge of the main vacuum heat insulation panel 3. 7 and a nut 8 are screwed to fix each main vacuum insulation panel 3 together with the main foam insulation panel 4 to the tank outer surface 1, and polyurethane foam injection foaming is performed on the joint 9 between the adjacent main vacuum insulation panels 3. Glass wool 10 for stopping liquid stock solution is filled.

  Further, as shown in FIG. 3, a polyurethane foam spacer 11 covering the top of the stud bolt 6 is installed along the joint portion 9 so as to straddle the adjacent main vacuum heat insulating panels 3, and the main foam heat insulating panel. 4 and between the spacers 11 and between the spacers 11 are filled with glass wool 12 for stopping the polyurethane foam injection foaming stock solution and a joint material 13 in which polyurethane foam is injected and foamed, and also shown in FIG. As described above, the auxiliary heat insulation panel unit C is stacked on the spacer 11 so as to straddle the joints between the spacers 11 to prevent heat from entering and leaving through the joints 9 and the stud bolts 6.

  As shown in FIG. 4, the auxiliary heat insulating panel unit C has a rectangular auxiliary vacuum heat insulating panel (thermal conductivity: 0.004 W / (m · K) at 0 ° C.) 14 that is rectangular in plan view, In advance, it is constructed by adhering and fixing a rectangular polyurethane foam auxiliary foam heat insulating panel 15 in plan view, and the auxiliary vacuum heat insulating panel 14 is positioned on the spacer 11 side so as to straddle both sides of the joint portion 9. On the outer surface side of the auxiliary foam heat insulating panel 15, as with the main foam heat insulating panel 4, an exterior material 5 having both a moisture-proof function and a protective function is attached over the entire surface.

  And as shown also in FIG. 5, between the adjacent main foam heat insulation panel 4 and the auxiliary heat insulation panel unit C, or between the auxiliary heat insulation panel units C, the joint material 16 in which polyurethane foam is injected and foamed is filled. Then, an exterior material 17 having a moisture-proof function and a protection function is adhesively fixed across the outer surface side of the joint material 16 and the exterior material 5 on both sides of the joint material 16, and further, both side edges of the exterior material 17 Is fixed with a rivet 18.

[Other Embodiments]
1. The heat insulation structure by this invention may be provided in order to insulate the heat insulation object surface, such as the outer wall inner surface of a double shell tank, an inner wall outer surface, or the outer surface of a pipe | tube.
2. In the heat insulating structure according to the present invention, the auxiliary vacuum heat insulating panel is provided along the joint portion between the adjacent vacuum heat insulating panels so as to cover the both sides of the joint portion on the heat insulation target surface side than the vacuum heat insulating panels. There may be.
3. In the heat insulating structure according to the present invention, the main vacuum heat insulating panel may be provided separately from the main foam heat insulating panel or the like.
4). In the heat insulating structure according to the present invention, the auxiliary vacuum heat insulating panel may be provided separately from the auxiliary foam heat insulating panel.
5. The heat insulation structure by this invention may be provided in order to insulate the outer surface of the tank which stores a high temperature fluid, and the pipe | tube through which a low temperature fluid or a high temperature fluid distribute | circulates.

Cross section of heat insulation structure Perspective view showing construction method of heat insulation structure Perspective view showing construction method of heat insulation structure Perspective view showing construction method of heat insulation structure Perspective view showing construction method of heat insulation structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface to be insulated 3 Vacuum insulation panel 4 Foamed resin insulation 9 Joint part 14 Auxiliary vacuum insulation panel

Claims (3)

A heat insulating structure in which a plurality of vacuum heat insulating panels are arranged side by side along the surface to be insulated, and adjacent to each other,
The plurality of vacuum heat insulation panels are arranged side by side so as to be adjacent to each other on a surface to be insulated, and a joint portion is provided between the adjacent vacuum heat insulation panels,
The foamed resin heat insulating material is fixed to the surface of the vacuum heat insulating panel opposite to the heat insulating target surface side so that the outer peripheral portion enters inside the outer peripheral portion of the vacuum heat insulating panel,
An auxiliary vacuum insulation panel, along the joint portion, the heat insulating structure thereof so as to extend on both sides in the width direction of the joint portion, which is provided between the outer periphery of the resin foam heat-insulating material adjacent.   The heat insulating material according to claim 1, wherein the heat insulating material made of foamed resin is preliminarily provided with a vacuum heat insulating panel which is fixed on one side so that an outer peripheral portion thereof is inward of an outer peripheral portion of the vacuum heat insulating panel. Construction.   The heat insulating structure according to claim 1 or 2, wherein an auxiliary foam heat insulating panel is bonded and fixed to an outer surface side of the auxiliary vacuum heat insulating panel.

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